/* ==========================================================================
   tokens.css — Primer 設計語彙（primer.style）自行實作，不吃外部 CDN
   ========================================================================== */

:root {
  color-scheme: light dark;

  --bgColor-default: #ffffff;
  --bgColor-muted: #f6f8fa;
  --bgColor-inset: #f6f8fa;
  --bgColor-neutral-muted: #818b981f;
  --bgColor-accent-muted: #ddf4ff;
  --bgColor-success-muted: #dafbe1;
  --bgColor-attention-muted: #fff8c5;
  --bgColor-danger-muted: #ffebe9;
  --bgColor-done-muted: #fbefff;

  --borderColor-default: #d1d9e0;
  --borderColor-muted: #d1d9e0b3;
  --borderColor-accent-emphasis: #0969da;

  --fgColor-default: #1f2328;
  --fgColor-muted: #59636e;
  --fgColor-onEmphasis: #ffffff;
  --fgColor-accent: #0969da;
  --fgColor-success: #1a7f37;
  --fgColor-attention: #9a6700;
  --fgColor-danger: #d1242f;
  --fgColor-done: #8250df;

  --shadow-resting-small: 0 1px 0 rgba(31, 35, 40, 0.04);
  --shadow-floating-small: 0 6px 12px -3px rgba(31, 35, 40, 0.12),
    0 6px 18px 0 rgba(31, 35, 40, 0.12);

  --borderRadius-small: 4px;
  --borderRadius-medium: 6px;
  --borderRadius-large: 12px;
  --borderRadius-full: 624rem;

  --base-size-4: 4px;
  --base-size-8: 8px;
  --base-size-12: 12px;
  --base-size-16: 16px;
  --base-size-24: 24px;
  --base-size-32: 32px;
  --base-size-40: 40px;

  --fontStack-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
    Helvetica, Arial, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei",
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --fontStack-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --header-height: 56px;
  --sidebar-width: 300px;
}

/* 深色主題：系統偏好為預設信號，data-theme 手動切換一律勝出 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bgColor-default: #0d1117;
    --bgColor-muted: #151b23;
    --bgColor-inset: #010409;
    --bgColor-neutral-muted: #656c7633;
    --bgColor-accent-muted: #388bfd1a;
    --bgColor-success-muted: #23863633;
    --bgColor-attention-muted: #bb800926;
    --bgColor-danger-muted: #f8514926;
    --bgColor-done-muted: #ab7df826;

    --borderColor-default: #3d444d;
    --borderColor-muted: #3d444db3;
    --borderColor-accent-emphasis: #316dca;

    --fgColor-default: #f0f6fc;
    --fgColor-muted: #9198a1;
    --fgColor-accent: #4493f8;
    --fgColor-success: #3fb950;
    --fgColor-attention: #d29922;
    --fgColor-danger: #f85149;
    --fgColor-done: #ab7df8;

    --shadow-resting-small: 0 1px 0 rgba(1, 4, 9, 0.3);
    --shadow-floating-small: 0 6px 12px -3px rgba(1, 4, 9, 0.3),
      0 6px 18px 0 rgba(1, 4, 9, 0.3);
  }
}

:root[data-theme="dark"] {
  --bgColor-default: #0d1117;
  --bgColor-muted: #151b23;
  --bgColor-inset: #010409;
  --bgColor-neutral-muted: #656c7633;
  --bgColor-accent-muted: #388bfd1a;
  --bgColor-success-muted: #23863633;
  --bgColor-attention-muted: #bb800926;
  --bgColor-danger-muted: #f8514926;
  --bgColor-done-muted: #ab7df826;

  --borderColor-default: #3d444d;
  --borderColor-muted: #3d444db3;
  --borderColor-accent-emphasis: #316dca;

  --fgColor-default: #f0f6fc;
  --fgColor-muted: #9198a1;
  --fgColor-accent: #4493f8;
  --fgColor-success: #3fb950;
  --fgColor-attention: #d29922;
  --fgColor-danger: #f85149;
  --fgColor-done: #ab7df8;

  --shadow-resting-small: 0 1px 0 rgba(1, 4, 9, 0.3);
  --shadow-floating-small: 0 6px 12px -3px rgba(1, 4, 9, 0.3),
    0 6px 18px 0 rgba(1, 4, 9, 0.3);
}

/* --- Reset -------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--base-size-16));
}

body {
  margin: 0;
  font-family: var(--fontStack-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--fgColor-default);
  background-color: var(--bgColor-default);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

a {
  color: var(--fgColor-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

svg {
  display: block;
  flex-shrink: 0;
}

:focus-visible {
  outline: 2px solid var(--fgColor-accent);
  outline-offset: -1px;
  border-radius: var(--borderRadius-small);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Utility ------------------------------------------------------------ */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--base-size-16);
}

/* --- Button ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--base-size-8);
  padding: 5px 12px;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  white-space: nowrap;
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
  background-color: var(--bgColor-muted);
  color: var(--fgColor-default);
  box-shadow: var(--shadow-resting-small);
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.btn:hover {
  background-color: var(--bgColor-neutral-muted);
  text-decoration: none;
}

.btn-invisible {
  border-color: transparent;
  background-color: transparent;
  box-shadow: none;
  color: var(--fgColor-muted);
}

.btn-invisible:hover {
  background-color: var(--bgColor-neutral-muted);
  color: var(--fgColor-default);
}

.btn-icon {
  padding: 5px;
}

/* --- Label & Counter ---------------------------------------------------- */

.Label {
  display: inline-flex;
  align-items: center;
  gap: var(--base-size-4);
  padding: 0 7px;
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  border: 1px solid transparent;
  border-radius: var(--borderRadius-full);
  white-space: nowrap;
}

.Label--release {
  color: var(--fgColor-accent);
  background-color: var(--bgColor-accent-muted);
  border-color: color-mix(in srgb, var(--fgColor-accent) 30%, transparent);
}

.Label--stretch {
  color: var(--fgColor-success);
  background-color: var(--bgColor-success-muted);
  border-color: color-mix(in srgb, var(--fgColor-success) 30%, transparent);
}

.Label--train {
  color: var(--fgColor-danger);
  background-color: var(--bgColor-danger-muted);
  border-color: color-mix(in srgb, var(--fgColor-danger) 30%, transparent);
}

.Label--neutral {
  color: var(--fgColor-muted);
  background-color: var(--bgColor-neutral-muted);
  border-color: var(--borderColor-muted);
}

.Label--accent {
  color: var(--fgColor-accent);
  background-color: var(--bgColor-accent-muted);
}

.Label--attention {
  color: var(--fgColor-attention);
  background-color: var(--bgColor-attention-muted);
  border-color: color-mix(in srgb, var(--fgColor-attention) 30%, transparent);
}

.Label--danger {
  color: var(--fgColor-danger);
  background-color: var(--bgColor-danger-muted);
  border-color: color-mix(in srgb, var(--fgColor-danger) 30%, transparent);
}

.Label--done {
  color: var(--fgColor-done);
  background-color: var(--bgColor-done-muted);
}

.Counter {
  display: inline-block;
  min-width: 20px;
  padding: 0 6px;
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--fgColor-default);
  background-color: var(--bgColor-neutral-muted);
  border: 1px solid var(--borderColor-muted);
  border-radius: var(--borderRadius-full);
}

/* --- Box ---------------------------------------------------------------- */

.Box {
  background-color: var(--bgColor-default);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
}

.Box__header {
  display: flex;
  align-items: center;
  gap: var(--base-size-8);
  padding: var(--base-size-12) var(--base-size-16);
  background-color: var(--bgColor-muted);
  border-bottom: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium) var(--borderRadius-medium) 0 0;
  font-size: 14px;
  font-weight: 600;
}

.Box__body {
  padding: var(--base-size-16);
}

/* --- Flash -------------------------------------------------------------- */

.Flash {
  display: flex;
  gap: var(--base-size-12);
  padding: var(--base-size-16);
  background-color: var(--bgColor-accent-muted);
  border: 1px solid color-mix(in srgb, var(--fgColor-accent) 30%, transparent);
  border-radius: var(--borderRadius-medium);
  font-size: 13px;
}

.Flash--warn {
  background-color: var(--bgColor-attention-muted);
  border-color: color-mix(in srgb, var(--fgColor-attention) 30%, transparent);
}

.Flash__icon {
  margin-top: 2px;
  color: var(--fgColor-accent);
}

.Flash--warn .Flash__icon {
  color: var(--fgColor-attention);
}

/* --- Blankslate --------------------------------------------------------- */

.Blankslate {
  padding: var(--base-size-40) var(--base-size-16);
  text-align: center;
  color: var(--fgColor-muted);
}

.Blankslate svg {
  margin: 0 auto var(--base-size-12);
  color: var(--fgColor-muted);
}

.Blankslate__heading {
  font-size: 16px;
  font-weight: 600;
  color: var(--fgColor-default);
}

/* --- ProgressBar -------------------------------------------------------- */

.ProgressBar {
  height: 8px;
  overflow: hidden;
  background-color: var(--bgColor-neutral-muted);
  border-radius: var(--borderRadius-full);
}

.ProgressBar__fill {
  height: 100%;
  background-color: var(--fgColor-success);
  border-radius: var(--borderRadius-full);
  transition: width 0.3s ease;
}

.ProgressBar--thin {
  height: 4px;
}